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2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b

 kernel/fs/jfs/jfs_txnmgr.c
.. .. @@ -354,6 +354,11 @@
354 354  	jfs_info("txBegin: flag = 0x%x", flag);
355 355  	log = JFS_SBI(sb)->log;
356 356  
357 +	if (!log) {
358 +		jfs_error(sb, "read-only filesystem\n");
359 +		return 0;
360 +	}
361 +
357 362  	TXN_LOCK();
358 363  
359 364  	INCREMENT(TxStat.txBegin);

..	..	@@ -354,6 +354,11 @@
354	354	jfs_info("txBegin: flag = 0x%x", flag);
355	355	log = JFS_SBI(sb)->log;
356	356
	357	+ if (!log) {
	358	+ jfs_error(sb, "read-only filesystem\n");
	359	+ return 0;
	360	+ }
	361	+
357	362	TXN_LOCK();
358	363
359	364	INCREMENT(TxStat.txBegin);